Implement the abstract 1-dimensional root finding interface using the Brent-Decker method.

This implementation is based on the one in the GNU scientific library (v0.99).

Definition at line 21 of file RooBrentRootFinder.h.

Public Member Functions
	RooBrentRootFinder (const RooAbsFunc &function)
	Constructor taking function binding as input. More...

virtual	~RooBrentRootFinder ()

virtual Bool_t	findRoot (Double_t &result, Double_t xlo, Double_t xhi, Double_t value=0) const
	Do the root finding using the Brent-Decker method. More...

void	setTol (Double_t tol)

Public Member Functions inherited from RooAbsRootFinder
	RooAbsRootFinder (const RooAbsFunc &function)
	Constructor take function binding as argument. More...

virtual	~RooAbsRootFinder ()

virtual Bool_t	findRoot (Double_t &result, Double_t xlo, Double_t xhi, Double_t value=0) const =0

Protected Types
enum	{ MaxIterations = 512 }

Protected Attributes
Double_t	_tol

Protected Attributes inherited from RooAbsRootFinder
const RooAbsFunc *	_function

Bool_t	_valid

#include <RooBrentRootFinder.h>

Inheritance diagram for RooBrentRootFinder:

[legend]

Member Enumeration Documentation

◆ anonymous enum

anonymous enum

protected

Enumerator
MaxIterations

Definition at line 33 of file RooBrentRootFinder.h.

Constructor & Destructor Documentation

◆ RooBrentRootFinder()

RooBrentRootFinder::RooBrentRootFinder ( const RooAbsFunc & function )

Constructor taking function binding as input.

Definition at line 44 of file RooBrentRootFinder.cxx.

◆ ~RooBrentRootFinder()

virtual RooBrentRootFinder::~RooBrentRootFinder ( )

inlinevirtual

Definition at line 24 of file RooBrentRootFinder.h.

Member Function Documentation

◆ findRoot()

Bool_t RooBrentRootFinder::findRoot	(	Double_t &	result,
		Double_t	xlo,
		Double_t	xhi,
		Double_t	value = `0`
	)		const

virtual

Do the root finding using the Brent-Decker method.

Returns a boolean status and loads 'result' with our best guess at the root if true. Prints a warning if the initial interval does not bracket a single root or if the root is not found after a fixed number of iterations.

Implements RooAbsRootFinder.

Definition at line 58 of file RooBrentRootFinder.cxx.

◆ setTol()

void RooBrentRootFinder::setTol ( Double_t tol )

inline

Definition at line 27 of file RooBrentRootFinder.h.

Member Data Documentation

◆ _tol

Double_t RooBrentRootFinder::_tol